Calculate the partial pressure of propane in a mixture that contains equal numbers of moles of propane (C3H8) and butane (C4H10) at 20 °C and 616 mmHg. (R=0.082 L-atm/K mol)

Answer 1

partial pressure is 1/2 616mmHg

http://en.wikipedia.org/wiki/Dalton%27s_law

partial pressure= Pressuretotal*molefraction